Red yeast rice aerobic fermentation equipment and fermentation method

Abstract

The invention relates to the technical field of fermentation equipment, in particular to red yeast rice aerobic fermentation equipment and a fermentation method.The red yeast rice aerobic fermentation equipment comprises a fermentation tank, a separation barrel is rotationally arranged in the fermentation tank, a circulating mixer is arranged in the fermentation tank, and the circulating mixer comprises a driving lead screw rotationally arranged in the separation barrel in a penetrating mode; a spiral blade located in the separation cylinder is arranged on the driving lead screw, a plurality of upper circulation openings distributed in the circumferential direction are formed in the upper side of the separation cylinder, and a plurality of lower circulation openings distributed in the circumferential direction are formed in the lower side of the separation cylinder; through the synergistic effect of the spiral blades and the auger blades, rice and monascus are fully mixed in the fermentation tank, so that the rice and the monascus form continuous circulating flow in the fermentation tank, and the problems of rice accumulation, too high core temperature and uneven local fermentation are avoided; the fermentation efficiency can be improved and the fermentation period can be shortened due to sufficient mixing and circular flowing.

Description

Technical Field

[0001] This application relates to the technical field of fermentation equipment, and particularly to an aerobic fermentation equipment and fermentation method for red yeast rice. Background Art

[0002] Red yeast rice is a traditional functional product made by fermenting red aspergillus on rice as the substrate. Its industrial production has long used the solid-state fermentation process. The traditional method usually spreads and steams the rice in open containers such as bamboo trays and ceramic vats, and ferments by natural inoculation or artificial spreading of strains. It relies on changes in environmental temperature and humidity to drive microbial metabolism. The aerobic fermentation process of red yeast rice has important application value in the production of traditional Chinese medicine decoction pieces. Through reasonable design and precise control, it can significantly improve the extraction rate of active ingredients in traditional Chinese medicine decoction pieces, reduce toxic ingredients, enhance the efficacy, and improve the taste.

[0003] Currently, most red yeast products are produced by solid-state fermentation. The production conditions are relatively extensive, the fermentation cycle is long, the contamination rate of miscellaneous bacteria is high, there are potential food safety hazards, the labor intensity of workers is large, the degree of automation is not high, and the production capacity improvement is significantly limited.

[0004] In order to overcome the limitations of traditional solid-state fermentation, modern red yeast rice production has gradually introduced aerobic fermentation technology. Aerobic fermentation refers to the fermentation process in which microorganisms carry out fermentation through oxidative metabolism under aerobic conditions.

[0005] For example, the aerobic fermentation equipment with the application number CN201510977644.0 relates to the technical field of organic solid waste treatment equipment. This prior art includes a fermentation tank, and a stirring device for mixing materials and stirring the materials from the feeding end to the discharging end of the fermentation tank along the length direction of the fermentation tank is arranged in the fermentation tank. Among them, a plurality of partitions are arranged at intervals along the length direction in the fermentation tank, the outer edges of the partitions are connected with the tank wall of the fermentation tank to divide the fermentation tank into a plurality of chambers along the length direction, and the partitions are provided with flow holes for the materials to move along the length direction in an S-shaped path to reach the discharging end. This aerobic fermentation equipment is beneficial to material fermentation and can improve the fluidity of materials.

[0006] However, the above prior art still has some defects when applied to the aerobic fermentation of red yeast rice: The air holes of the aeration pipeline in the above prior art are arranged obliquely downward, which means that oxygen mainly enters the fermentation tank from below or obliquely below. This single-direction aeration method easily causes "air flow channels" to form during the upward movement of oxygen, that is, oxygen rises along the path with less resistance, while the oxygen concentration in other areas (such as corners and areas far from the air holes) is relatively low.

[0007] At the same time, after oxygen is released from the aeration holes, the oxygen concentration will gradually decrease with the increase of distance. The bottom and corner areas of the fermentation bin are far away from the aeration holes, and the oxygen concentration in these areas may not meet the needs of aerobic fermentation.

[0008] In addition, the stirring paddle of the stirring device may not be able to completely cover all areas of the fermentation tank, especially in the edge and corner areas of the partition, where the stirring effect is poor, which will slow down the diffusion rate of oxygen in these areas, further aggravating the uneven distribution of oxygen.

[0009] In addition, although the S-shaped path of the above technology increases the flow path of the material, if the path design is too complicated, it may cause the material to stagnate at certain turns and form local accumulation. The accumulation of materials will hinder the flow of gas in the fermentation bin and affect the uniform distribution of oxygen, thereby affecting the fermentation effect. The accumulated materials are prone to form local high-temperature areas, resulting in uneven fermentation and may even produce harmful substances.

[0010] Based on this, and according to the above-mentioned viewpoints, the existing technology for aerobic fermentation of red yeast rice still has room for improvement. Summary of the invention

[0011] In order to solve the above technical problems, the present application provides a red yeast rice aerobic fermentation device and a fermentation method, which adopts the following technical solutions: In a first aspect, a red yeast rice aerobic fermentation device comprises a fermentation tank, a partition cylinder is rotatably arranged in the fermentation tank, and a circulating mixer is arranged in the fermentation tank; The circulating mixer includes a driving screw that rotates and passes through the separation cylinder. The driving screw is provided with a spiral blade located in the separation cylinder. The upper side of the separation cylinder is provided with a plurality of circumferentially distributed upper circulation ports, and the lower side of the separation cylinder is provided with a plurality of circumferentially distributed lower circulation ports.

[0012] Preferably, the circulating mixer further comprises a circulating cavity formed between the partition cylinder and the fermentation tank, and a plurality of transmission shafts located in the circulating cavity are rotatably penetrated on the partition cylinder, and the transmission shafts are evenly distributed in the circumferential direction of the partition cylinder cavity; The transmission shaft is provided with auger blades located in the circulation cavity.

[0013] Preferably, a scraper connected to the separation cylinder is arranged between the two transmission shafts, and the scraper is rotatably arranged in the circulation chamber and one end of the scraper is in contact with the inner wall of the fermentation tank.

[0014] Preferably, a feed port corresponding to the inside of the separation cylinder is opened on the top of the fermentation tank, a feed ring is arranged on the feed port, and a sealing cover is arranged on the connecting ring.

[0015] Preferably, an annular groove is provided at the upper end of the separation cylinder, a connecting ring is rotatably arranged in the annular groove, and the connecting ring is rotatably connected to the feed ring; The connecting ring is provided with a circulation port corresponding to each upper circulation port one by one.

[0016] Preferably, a driving member is provided at the bottom of the fermentation tank; The driving member includes a gear ring provided at the bottom of the partition cylinder, a driving gear provided on the driving screw rod and located at the bottom of the partition cylinder, and a transmission gear provided on the transmission shaft and meshing with the gear ring and the driving gear.

[0017] Preferably, an oxygen circulator is provided on the fermentation tank; The oxygen circulator includes an air inlet hole opened at the bottom of the driving screw rod, and a plurality of circulation holes opened on the driving screw rod and located inside the partition cylinder, and the circulation holes are communicated with the air inlet hole.

[0018] Preferably, a protective cover is provided at the bottom of the fermentation tank, an air inlet pipe passing through the bottom of the protective cover and rotatably connected to the air inlet hole is provided, one end of the air inlet pipe is connected with a circulation pipe, one end of the circulation pipe is an air inlet end and the other end is an air outlet end, and the air outlet end penetrates into the feed ring.

[0019] Preferably, a sealing plug is slidably arranged in the circulation pipe, and a return spring is arranged on one side of the sealing plug facing away from the air inlet end.

[0020] In a second aspect, a method for aerobic fermentation of red yeast rice, its usage method includes the following steps: S1: Fermentation preparation, when putting rice and Monascus purpureus into the fermentation tank, first open the sealing cover, put the rice and Monascus purpureus into the feed ring, and convey the rice and Monascus purpureus from the feed port to the bottom of the partition cylinder downward through the spiral blade, so that the rice and Monascus purpureus are circulated and mixed in the circulation cavity inside the partition cylinder; S2: Circulation and mixing, when the driving screw rod rotates, the spiral blade conveys the rice and Monascus purpureus from the bottom of the partition cylinder upward, enters the circulation cavity from the upper circulation port, and at the same time the auger blade conveys the rice and Monascus purpureus from the bottom inside the circulation cavity and is conveyed upward by the spiral blade again to form a circulation; S3: Scraping off residues, the partition cylinder drives the scraper to rotate together, and the rotating scraper scrapes off the rice and Monascus purpureus on the inner wall of the fermentation tank and makes them enter the circulation cavity; S4: Oxygen supply, the air inlet end of the circulation pipe is connected with an oxygen supply device, an air pump is arranged on the air inlet pipe, the oxygen in the circulation pipe is pumped to the air inlet hole through the air pump, and then enters the partition cylinder from the air inlet hole to fully contact with the red yeast rice in the circulation and mixing; S5: Oxygen circulation, the oxygen in the partition cylinder moves towards the feed ring and then enters from the air outlet end of the circulation pipe, so as to realize the internal circulation of oxygen in the fermentation tank.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the synergistic effect of the spiral blade and the auger blade, the rice and Monascus purpureus are fully mixed in the fermentation tank, enabling the rice and Monascus purpureus to form a continuous circulating flow in the fermentation tank, avoiding problems such as rice accumulation, excessively high core temperature, and uneven local fermentation. The full mixing and circulating flow contribute to improving the fermentation efficiency and shortening the fermentation cycle.

[0022] 2. The present invention allows oxygen to enter the air inlet hole of the driving lead screw through an air pump, and then enter the partition cylinder through the air inlet hole, making full contact with the red yeast rice in the circulating mixture. The oxygen in the partition cylinder will move into the feeding ring and then enter from the air outlet end of the circulating pipe, thus realizing the internal circulation of oxygen in the fermentation tank, ensuring the continuous flow and full contact of oxygen in the fermentation tank, enabling the oxygen to be evenly distributed in the fermentation tank, and avoiding the occurrence of local oxygen deficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the present invention.

[0024] Figure 2 is a schematic structural diagram of the fermentation tank of the present invention.

[0025] Figure 3 is an exploded view between the fermentation tank and the partition cylinder of the present invention.

[0026] Figure 4 is a schematic structural diagram of the circulating mixer of the present invention.

[0027] Figure 5 is a sectional view of the partition cylinder of the present invention.

[0028] Figure 6 is the present invention Figure 5 partial enlarged view at A in.

[0029] Figure 7 is a schematic structural diagram of the connecting ring of the present invention.

[0030] Figure 8 is a planar schematic diagram of the driving member of the present invention Figure 9 is a sectional view of the oxygen circulator of the present invention.

[0031] Figure 10 is a sectional view of the driving lead screw of the present invention.

[0032] Figure 11 is a schematic structural diagram of the oxygen circulator of the present invention.

[0033] Figure 12 is the present invention Figure 11 partial enlarged view at B in.

[0034] Figure 13 is the present inventionFigure 11 Partial enlarged view at position C in the figure.

[0035] Figure 14 It is a schematic structural diagram of the flipping mechanism of the present invention.

[0036] Figure 15 It is a schematic structural diagram between the sealing plug and the return spring of the present invention.

[0037] Explanation of reference numerals: 1, fermentation tank; 2, partition cylinder; 3, circulation mixer; 31, driving lead screw; 311, spiral blade; 32, transmission shaft; 321, auger blade; 33, upper circulation port; 34, lower circulation port; 35, circulation cavity; 36, scraper; 37, feed port; 371, feed ring; 372, sealing cover; 38, annular groove; 381, connecting ring; 382, lever; 39, flow port; 4, driving member; 41, gear ring; 42, driving gear; 43, transmission gear; 5, oxygen circulator; 51, air inlet hole; 511, flow hole; 52, oxygen inlet cavity; 521, oxygen inlet hole; 53, protective cover; 54, inlet pipe; 55, circulation pipe; 551, air inlet end; 552, air outlet end; 56, sealing plug; 561, return spring; 57, sealing ring; 571, ventilation hole; 58, rotating ring; 581, connecting hole; 59, connecting pipe. Detailed implementation mode

[0038] The following is a further detailed description in conjunction with Figures 1 to 15 This application.

[0039] The embodiment of this application discloses an aerobic fermentation device and fermentation method for red yeast rice. By forming a continuous circulating flow of rice and Monascus purpureus in the fermentation tank, problems such as rice accumulation, excessive core temperature, and uneven local fermentation are avoided. Sufficient mixing and circulating flow contribute to improving the fermentation efficiency and shortening the fermentation cycle.

[0040] Embodiment 1: Referring to Figure 1 、 Figure 2 And Figure 3 As shown, an aerobic fermentation device for red yeast rice includes a fermentation tank 1. A partition cylinder 2 is rotatably arranged in the fermentation tank 1. Red yeast rice is made by fermenting rice as a substrate with Monascus purpureus. During fermentation, first put the rice into the fermentation tank 1, and then put Monascus purpureus into the fermentation tank 1.

[0041] Subsequently, start the circulation mixer 3 arranged in the fermentation tank 1. The circulation mixer 3 can make the rice and Monascus purpureus circulate between the partition cylinder 2 and the fermentation tank 1, so that the rice and Monascus purpureus are fully mixed to improve the fermentation effect.

[0042] Referring to Figure 2 、 Figure 3 、 Figure 4and Figure 5 As shown in Figure 5 , specifically, the circulation mixer 3 includes a driving lead screw 31 rotatably passing through the separation cylinder 2. The circulation mixer 3 further includes a circulation chamber 35 formed between the separation cylinder 2 and the fermentation tank 1. A plurality of transmission shafts 32 are rotatably provided on the separation cylinder 2 and are circumferentially uniformly distributed within the circulation chamber 35.

[0043] After putting rice and Monascus purpureus into the fermentation tank 1, the driving lead screw 31 is driven to rotate by a servo motor (not shown in the figure). At the same time, the driving lead screw 31 drives the transmission shaft 32 to rotate through a driving member 4 provided at the bottom of the fermentation tank 1, and the rotation direction of the transmission shaft 32 is opposite to that of the driving lead screw 31.

[0044] When the driving lead screw 31 rotates, the driving lead screw 31 will drive the spiral blade 311 provided thereon. The spiral blade 311 is located within the separation cylinder 2, while the transmission shaft 32 will drive the auger blade 321 provided thereon. The auger blade 321 is located within the circulation chamber 35.

[0045] When the driving lead screw 31 rotates forward, the spiral blade 311 will convey rice and Monascus purpureus upward from the bottom of the separation cylinder 2, so that the rice and Monascus purpureus enter the circulation chamber 35 through a plurality of upper circulation ports 33 opened on the upper side of the separation cylinder 2. The plurality of upper circulation ports 33 are circumferentially uniformly distributed on the separation cylinder 2. At the same time, the auger blade 321 will rotate in the opposite direction to the spiral blade 311, and convey the rice and Monascus purpureus in the circulation chamber 35 from the upper end to the bottom of the circulation chamber 35. The rice and Monascus purpureus entering the bottom of the circulation chamber 35 will enter the separation cylinder 2 through a plurality of lower circulation ports 34 provided on the lower side of the separation cylinder 2 and be conveyed upward by the spiral blade 311 again to form a circulation, and the plurality of lower circulation ports 34 are circumferentially uniformly distributed on the separation cylinder 2.

[0046] Conversely, when the driving lead screw 31 rotates reversely, the spiral blade 311 will convey rice and Monascus purpureus downward from the bottom of the separation cylinder 2, so that the rice and Monascus purpureus enter the circulation chamber 35 through the lower circulation port 34. At the same time, the auger blade 321 will rotate in the opposite direction to the spiral blade 311, and convey the rice and Monascus purpureus in the circulation chamber 35 from the bottom end to the upper end of the circulation chamber 35. The rice and Monascus purpureus entering the upper end of the circulation chamber 35 will enter the separation cylinder 2 through the upper circulation port 33 and be conveyed downward by the spiral blade 311 again to form a circulation.

[0047] The temperature is detected inside the fermentation tank 1 by a temperature sensor (not shown in the figure). According to the growth characteristics of Monascus, an appropriate fermentation temperature range is set. Through the synergistic effect of the spiral blades 311 and the auger blades 321, the rice and Monascus are fully mixed inside the fermentation tank 1, enabling the rice and Monascus to form a continuous circulating flow inside the fermentation tank 1, avoiding problems such as rice accumulation, excessive core temperature, and uneven local fermentation. The sufficient mixing and circulating flow contribute to improving the fermentation efficiency and shortening the fermentation cycle.

[0048] Look back Figure 2 、 Figure 3 and Figure 4 As shown, a feed inlet 37 corresponding to the inside of the partition cylinder 2 is provided at the top of the fermentation tank 1. A feed ring 371 is provided on the feed inlet 37, and a sealing cover 372 is provided on the connecting ring 381.

[0049] When putting the rice and Monascus into the fermentation tank 1, first open the sealing cover 372. The rice and Monascus are put into the feed ring 371. The servo motor is used to drive the driving screw 31 to reverse, and the rice and Monascus in the feed ring 371 are conveyed downward from the feed inlet 37 to the bottom of the partition cylinder 2, so that the rice and Monascus are circulated and mixed in the circulation cavity 35 inside the partition cylinder 2.

[0050] When the driving screw 31 is driven to rotate by the servo motor, the driving member 4 will drive the partition cylinder 2 to rotate synchronously with the driving screw 31. The rotating partition cylinder 2 will drive a plurality of transmission shafts 32 to revolve around the driving screw 31, thereby further mixing the rice and Monascus.

[0051] Refer to Figure 4 As shown, a scraper 36 connected to the partition cylinder 2 is provided between the two transmission shafts 32. The scraper 36 is rotatably arranged in the circulation cavity 35 and one end thereof is in contact with the inner wall of the fermentation tank 1.

[0052] At the same time, the partition cylinder 2 will drive the scraper 36 to rotate together. The rotating scraper 36 will scrape off the rice and Monascus on the inner wall of the fermentation tank 1 and make them enter the circulation cavity 35, ensuring the uniform distribution and sufficient mixing of the rice and Monascus inside the fermentation tank 1.

[0053] Refer to Figure 5 、 Figure 6 and Figure 7 As shown, an annular groove 38 is provided at the upper end of the partition cylinder 2. A connecting ring 381 is rotatably arranged in the annular groove 38, and the connecting ring 381 is rotatably connected to the feed ring 371. A dial rod 382 is provided on the connecting ring 381, and a through hole 39 corresponding to the upper circulation port 33 one by one is provided on the connecting ring 381.

[0054] When putting rice and Monascus purpureus into the connecting ring 381, rotate the connecting ring 381 through the lever 382 to make the circulation port 39 correspond to the upper circulation port 33 one by one, so that the rice and Monascus purpureus can circulate in the circulation cavity 35 and the partition cylinder 2; when the partition cylinder 2 rotates, the partition cylinder 2 will drive the connecting ring 381 to rotate together, making the upper circulation port 33 communicate with the communication port to ensure the smooth progress of the circulating mixing.

[0055] After fermentation is completed, first open the sealing cover 372, rotate the connecting ring 381 through the lever 382 to make the circulation port 39 and the upper circulation port 33 intersect with each other, so that the connecting ring 381 blocks the upper circulation port 33, and then drive the driving screw 31 to rotate forward through the servo motor. The driving screw 31 will drive the spiral blade 311 to convey the fermented red yeast rice to the feeding ring 371, and the auger blade 321 will convey the red yeast rice in the circulation cavity 35 into the partition cylinder 2 to realize the discharge of the red yeast rice.

[0056] Refer to Figure 8 As shown, specifically, the driving member 4 includes a gear ring 41 arranged at the bottom of the partition cylinder 2, a driving gear 42 arranged on the driving screw 31 at the bottom of the partition cylinder 2, and a transmission gear 43 arranged on the transmission shaft 32 and meshing with the gear ring 41 and the driving gear 42.

[0057] When driving the driving screw 31 to rotate through the servo motor, the driving screw 31 will drive the driving gear 42 to rotate. The driving gear 42 will rotate through meshing with the transmission gear 43, making the transmission shaft 32 rotate in the opposite direction to the driving screw 31. At the same time, the transmission gear 43 will drive the partition cylinder 2 to rotate through meshing with the gear ring 41.

[0058] It should be noted that during the aerobic fermentation process of red yeast rice, according to the actual requirements of the fermentation process, set the intermittent period of the mixing cycle. Intermittently turning on the mixing cycle can effectively prevent material accumulation and avoid the influence of excessive stirring on Monascus purpureus. Combining with the data of the temperature sensor, the intelligent control system can automatically adjust the opening time and frequency of the mixing cycle. For example, when the temperature sensor detects an abnormal increase in temperature, automatically start the mixing cycle to cool down.

[0059] During the fermentation process, the macromolecular substances of red yeast rice are degraded into small molecular substances, which are more easily absorbed by the human body, thereby improving the bioavailability of traditional Chinese medicine decoction pieces.

[0060] Embodiment 2: Refer to Figure 9 、 Figure 10 、 Figure 11 and Figure 12As shown, on the basis of the first embodiment, an oxygen circulator 5 is provided on the fermenter 1. The oxygen circulator 5 can supply oxygen to the fermenter 1 during the fermentation process. By continuously supplying oxygen, an aerobic environment inside the fermenter 1 is maintained to ensure the normal growth and metabolism of Monascus purpureus.

[0061] Specifically, the oxygen circulator 5 includes an air inlet hole 51 opened at the bottom of the driving lead screw 31. A number of flow holes 511 are opened in the driving lead screw 31 and are located inside the partition cylinder 2, and the flow holes 511 communicate with the air inlet hole 51.

[0062] A protective cover 53 is provided at the bottom of the fermenter 1. An air inlet pipe 54 that is rotatably connected to the air inlet hole 51 penetrates through the bottom of the protective cover 53. One end of the air inlet pipe 54 is connected to a circulation pipe 55. One end of the circulation pipe 55 is an air inlet end 551, and the other end is an air outlet end 552.

[0063] The air inlet end 551 of the circulation pipe 55 is connected to an oxygen supply device (not shown in the figure). An air pump is provided on the air inlet pipe 54. The oxygen in the circulation pipe 55 is pumped towards the air inlet hole 51 by the air pump, and then enters the partition cylinder 2 through the air inlet hole 51, making full contact with the red kojic rice in the circulation mixture.

[0064] The oxygen in the oxygen supply device will enter from the air inlet end 551 of the circulation pipe 55 under the extraction of the air pump, and then push the sealing plug 56 slidably arranged in the circulation pipe 55 to move, compressing the return spring 561 arranged on the side of the sealing plug 56 away from the air inlet end 551, so that the air inlet pipe 54 communicates with the air inlet end 551 of the circulation pipe 55, and the oxygen smoothly enters the air inlet pipe 54 from the air inlet end 551 of the circulation pipe 55.

[0065] When the oxygen pressure in the fermenter 1 is the same as that in the oxygen supply device, since the air outlet end 552 of the circulation pipe 55 penetrates into the feed ring 371, the oxygen pressure at the air outlet end 552 of the circulation pipe 55 is the same as that of the device. At this time, the compressed return spring 561 will push the sealing plug 56 to block the air inlet end 551 of the circulation pipe 55, enabling the oxygen in the fermenter 1 to perform internal circulation.

[0066] That is, since the sealing plug 56 blocks the air inlet end 551 of the circulation pipe 55, the oxygen in the fermenter 1 will enter the circulation pipe 55 from the air outlet end 552, then enter the air inlet hole 51 of the driving lead screw 31 through the air inlet pipe 54, and then enter the partition cylinder 2 through the air inlet hole 51, making full contact with the red kojic rice in the circulation mixture.

[0067] The oxygen in the partition cylinder 2 will move towards the feed ring 371 and then enter from the air outlet end 552 of the circulation pipe 55, thus realizing the internal circulation of oxygen in the fermenter 1, ensuring the continuous flow and full contact of oxygen in the fermenter 1, enabling the oxygen to be evenly distributed in the fermenter 1, and avoiding the occurrence of local oxygen deficiency.

[0068] Referring to Figure 13 、 Figure 14 and Figure 15 As shown, in addition, an oxygen inlet chamber 52 is provided in the drive shaft 32, and a plurality of oxygen inlet holes 521 communicating with the oxygen inlet chamber 52 are provided in the drive shaft 32. A sealing ring 57 is rotatably provided on the air inlet pipe 54, and an air vent hole 571 located within the sealing ring 57 is provided on the air inlet pipe 54. A rotating ring 58 is rotatably provided on the drive shaft 32, and a connection hole 581 located within the rotating ring 58 is provided on the drive shaft 32. A connection pipe 59 communicates between the sealing ring 57 and the rotating ring 58.

[0069] When oxygen enters the air inlet pipe 54, a part of the oxygen will enter the sealing ring 57 through the air vent hole 571, then pass through the connection pipe 59 to reach the rotating ring 58, enter the oxygen inlet chamber 52 through the connection hole 581, and then enter the circulation chamber 35 through the oxygen holes, not only providing a stable oxygen supply, but also ensuring the continuous flow and full contact of oxygen within the fermenter 1 through the internal circulation mechanism.

[0070] When driving the drive screw 31 to rotate through the servo motor, the partition cylinder 2 will drive the drive shaft 32 to revolve, and the connecting ring 381 will drive the sealing ring 57 to rotate on the air inlet pipe 54 through the connection pipe 59. At the same time, the drive shaft 32 will rotate within the connecting ring 381, without affecting the flow of oxygen.

[0071] Finally, the present invention also provides a method for aerobic fermentation of red yeast rice, and its usage method includes the following steps: S1: Fermentation preparation. When putting rice and Monascus purpureus into the fermenter 1, first open the sealing cover 372, put the rice and Monascus purpureus into the feeding ring 371, and drive the drive screw 31 to reverse through the servo motor, so as to convey the rice and Monascus purpureus in the feeding ring 371 downward from the feeding port 37 to the bottom of the partition cylinder 2, so that the rice and Monascus purpureus are circulated and mixed within the circulation chamber 35 of the partition cylinder 2.

[0072] S2: Circulating and mixing. When the drive screw 31 rotates, the spiral blade 311 will convey the rice and Monascus purpureus upward from the bottom of the partition cylinder 2, so that the rice and Monascus purpureus enter the circulation chamber 35 from the upper circulation port 33. At the same time, the auger blade 321 will convey the rice and Monascus purpureus in the circulation chamber 35 to the bottom and be conveyed upward by the spiral blade 311 again to form a circulation.

[0073] S3: Scraping residues. At the same time, the partition cylinder 2 will drive the scraper 36 to rotate together, and the rotating scraper 36 will scrape the rice and Monascus purpureus on the inner wall of the fermenter 1, so that they enter the circulation chamber 35, ensuring the uniform distribution and full mixing of the rice and Monascus purpureus within the fermenter 1.

[0074] S4: Oxygen supply. The intake end 551 of the circulation pipe 55 is connected to an oxygen supply device. An air pump is provided on the intake pipe 54. The oxygen in the circulation pipe 55 is pumped towards the intake hole 51 by the air pump, and then enters the partition cylinder 2 through the intake hole 51 to fully contact the Monascus rice in the circulating mixture.

[0075] S5: Oxygen circulation. The oxygen in the partition cylinder 2 will move into the feed ring 371 and then enter from the outlet end 552 of the circulation pipe 55, thus realizing the internal oxygen circulation in the fermenter 1, ensuring the continuous flow and full contact of oxygen in the fermenter 1, enabling the oxygen to be evenly distributed in the fermenter 1, and avoiding the occurrence of local oxygen deficiency.

[0076] S6: Discharge. When the fermentation is completed, first open the sealing cover 372, rotate the connecting ring 381 through the lever 382 to stagger the circulation port 39 and the upper circulation port 33, so that the connecting ring 381 blocks the upper circulation port 33. Then, drive the driving screw rod 31 to rotate forward by the servo motor. The driving screw rod 31 will drive the spiral blade 311 to convey the fermented Monascus rice towards the feed ring 371, and the auger blade 321 will convey the Monascus rice in the circulation chamber 35 towards the partition cylinder 2 to realize the discharge of the Monascus rice.

[0077] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An aerobic fermentation device for red yeast rice, comprising a fermentation tank (1), wherein a partition cylinder (2) is rotatably arranged in the fermentation tank (1), and the characteristics are as follows: A circulation mixer (3) is arranged inside the fermentation tank (1); The circulation mixer (3) includes a driving lead screw (31) rotatably penetrating through a partition cylinder (2). A spiral blade (311) located inside the partition cylinder (2) is arranged on the driving lead screw (31). A plurality of circumferentially distributed upper circulation ports (33) are formed in the upper side of the partition cylinder (2), and a plurality of circumferentially distributed lower circulation ports (34) are formed in the lower side of the partition cylinder (2).

2. An aerobic fermentation device for red kojic rice according to claim 1, characterized in that: The circulation mixer (3) further includes a circulation cavity (35) formed between the partition cylinder (2) and the fermentation tank (1). A plurality of transmission shafts (32) located inside the circulation cavity (35) are rotatably penetrating through the partition cylinder (2). The transmission shafts (32) are circumferentially and uniformly distributed on the inner circumference of the partition cylinder (2) cavity; Auger blades (321) located inside the circulation cavity (35) are arranged on the transmission shafts (32).

3. An aerobic fermentation device for red kojic rice according to claim 1, characterized in that: A scraper (36) connected to the partition cylinder (2) is arranged between two transmission shafts (32). The scraper (36) is rotatably arranged inside the circulation cavity (35) and one end thereof is in contact with the inner wall of the fermentation tank (1).

4. An aerobic fermentation device for red kojic rice according to claim 1, characterized in that: A feed port (37) corresponding to the inside of the partition cylinder (2) is formed at the top of the fermentation tank (1). A feed ring (371) is arranged on the feed port (37), and a sealing cover (372) is arranged on the connecting ring (381).

5. An aerobic fermentation device for red yeast rice according to claim 4, characterized in that: An annular groove (38) is formed at the upper end of the partition cylinder (2). A connecting ring (381) is rotatably arranged inside the annular groove (38), and the connecting ring (381) is rotatably connected to the feed ring (371); Circulation ports (39) corresponding to the upper circulation ports (33) one by one are formed on the connecting ring (381).

6. A Monascus rice aerobic fermentation device according to claim 1, characterized in that: A driving member (4) is arranged at the bottom of the fermentation tank (1); The driving member (4) includes a gear ring (41) arranged at the bottom of the partition cylinder (2). A driving gear (42) located at the bottom of the partition cylinder (2) is arranged on the driving lead screw (31). Transmission gears (43) meshing with the gear ring (41) and the driving gear (42) are arranged on the transmission shafts (32).

7. An aerobic fermentation device for red kojic rice according to claim 2, characterized in that: An oxygen circulator (5) is arranged on the fermentation tank (1); The oxygen circulator (5) includes an air inlet hole (51) formed at the bottom of the driving lead screw (31). A plurality of circulation holes (511) located inside the partition cylinder (2) are formed on the driving lead screw (31), and the circulation holes (511) are communicated with the air inlet hole (51).

8. An aerobic fermentation device for red kojic rice according to claim 7, characterized in that: A protective cover (53) is arranged at the bottom of the fermentation tank (1). An air inlet pipe (54) rotatably connected to the air inlet hole (51) penetrates through the bottom of the protective cover (53). One end of the air inlet pipe (54) is connected with a circulation pipe (55). One end of the circulation pipe (55) is an air inlet end (551) and the other end is an air outlet end (552). The air outlet end (552) penetrates into the feed ring (371).

9. An aerobic fermentation device for red kojic rice according to claim 8, characterized in that: A sealing plug (56) is slidably arranged inside the circulation pipe (55). A return spring (561) is arranged on the side of the sealing plug (56) facing away from the air inlet end (551).

10. A method for aerobic fermentation of red kojic rice, which uses an aerobic fermentation device for red kojic rice according to any one of claims 1-9, characterized in that, Its usage method includes the following steps: S1: Fermentation preparation. When putting rice and Monascus purpureus into the fermentation tank (1), first open the sealing cover (372), put the rice and Monascus purpureus into the feeding ring (371), and convey the rice and Monascus purpureus from the feeding port (37) to the bottom of the partition cylinder (2) downward through the spiral blade (311), so that the rice and Monascus purpureus are circulated and mixed in the circulation cavity (35) of the partition cylinder (2); S2: Circulating and mixing. When the driving lead screw (31) rotates, the spiral blade (311) conveys the rice and Monascus purpureus from the bottom of the partition cylinder (2) upward, enters the circulation cavity (35) from the upper circulation port (33). At the same time, the auger blade (321) conveys the rice and Monascus purpureus from the bottom of the circulation cavity (35), and is conveyed upward by the spiral blade (311) again to form a cycle; S3: Scraping residues. The partition cylinder (2) drives the scraper (36) to rotate together, and the rotating scraper (36) scrapes the rice and Monascus purpureus on the inner wall of the fermentation tank (1) so that they enter the circulation cavity (35); S4: Oxygen supply. The air inlet end (551) of the circulation pipe (55) is connected to the oxygen supply equipment. An air pump is arranged on the air inlet pipe (54). The oxygen in the circulation pipe (55) is pumped to the air inlet hole (51) through the air pump, and then enters the partition cylinder (2) from the air inlet hole (51) to fully contact with the red yeast rice in the circulating mixture; S5: Oxygen circulation. The oxygen in the partition cylinder (2) moves into the feeding ring (371), and then enters from the air outlet end (552) of the circulation pipe (55), so as to realize the internal circulation of oxygen in the fermentation tank (1).

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